Here we are:

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Here is one from Tilgear for £39. Well worth the investment.
http://www.tilgear.info/diatec/dia0912gp–diatec-granite-surface-plate-dimensions-9in-x-12in-x-2in-
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Of course this is a UK link, perhaps you could search for the same brand and see if it’s available in Canada. I bought this one on Paul’s recommendation and have been very satisfied. A larger one would be handy, however this one is about as heavy as I can lug onto and off of the bench easily. A larger one would probably need its own permanent stand.